Insulating support for electric wiring



Dec. 14, 1948.

H. DORJEE INSULATING SUPPORT FOR ELECTRIC WIRING Filed Feb. 5, 1947 1 INVENTOR H. DORJEE to sections close to the Patented Dec. 14, 1948 2,456,259 INSULATING surroa'aroa ELECTRIC Hendrik Do'rje, Eindlioven, Netherlands, assignor to Hartford National Bank and Trust Company, Hartford, Conn., as trustee Application February 5, 1947, Serial No. 726,639 In The Netherlands February 21, 1944 Section 1, Public Law 690, August 8, 1946 Patent expires February 21, 1964 2 Claims.

In electric apparatus it is customary to secure small parts such as condensers and resistances to a common supporting member by means of their supply conductors. obtain an assembly having a pleasant appearance and permitting an easy view.

A common supporting member consists of a strip of hard paper into which are clamped solderir'i g tags for connecting the parts. This construction is very slack. Moreover, the said strip must be furnished with special parts for the attachment to a frame. Furthermore the strip must be equipped with several fastening clips to permit it to be mounted in either a horizontal or a vertical manner with respect to a supporting surface. In addition the attachment of the clips to the strip had the drawback of being difficult of accomplishment in a sufficiently sturdy manner.

According to the present invention, by which these drawbacks are avoided, the wiring is supported by means of a member, which consists of asupporting arm constituting an independent unit and comprising a series of contact pieces, said arm being formed at one end into a mounting foot. In the present case the wiring consequently includes the supply conductors of parts such as condensers. However, the mounting column according to the invention can be used at the same time for supporting the various wire connections between the parts of the electric apparatus that are usually called wiring.

The expression that the member according to the invention constitutes an independent unit means that no additional fixation members need be added, but that the said connections can be directly secured to a supporting plate as a result of the said arm being formed into a mounting foot at one end. Furthermore, to employ the supporting arm as an independent unit an adequate thickness is necessary which permits the contact pieces to be secured in the arm in a suitable manner.

The cross-section of the supporting arm is preferably U-shaped, the sides of the U in regard foot being longer than in regard to sections at a larger distance therefrom. As a result ofthis shape the arm is very sturdy and yet requires little material. The length of the limbs in the cross-section may be adapted to the load on the supporting arm. This holds more particularly when the increase in length of the sides of the U corresponds with the line of the moments, since in this way it is ensured Thus it is sought to that the supporting arm has a constant strength throughout its length.

To increase the attachment of the supporting arm to a base in a simple manner the foot is preferably so designed as to form a ridge having a bore at the foot between the side of the arm giving it a U-shaped cross-section. The bore serves to take up a screw, whose head may rest on the ridge and which permits a vertical mounting of the supporting arm.

In another advantageous form of construction of the invention the arm, towards the foot, exhibits an increase in surface of its cross-section, but at the foot, the side opposite the side where the contact pieces are located, extends parallel with the longitudinal direction of the arm. The presence of the said surface permits the supporting arm to be mounted also horizontally, so that the plane, in which the contact pieces extend, is parallel with the plane of the base to which the arm is secured. At the section of the arm which decreases in cross-section towards the free end, it is obtained at the same time that the arm is secured to and engages the base by means of the surface at the foot so that an accurate position of the arm is secured, while the mounting is facilitated, since the contact pieces are at some distance above the plate of the frame.

To permit a simple and suitable horizontal mounting the foot is preferably provided with a bore which extends normal to the plane of the contact pieces.

In order that the invention may be clearly understood and readily carried into effect it will now be explained more fully with reference to the accompanying drawing, representing, by way of example, one form of construction of the supporting arm according thereto.

Fig. 1 is a perspective view of a supporting arm according to the invention, Fig. 2 being a back view and Fig. 3 a bottom view of the supporting arm shown in Fig. 1.

The supporting arm consists of a moulding I having aU-proflie, thus forming the sides In and II of the arm. The supporting arm is preferably made by pressing. The material used may be synthetic resin, but it is also possible, more particularly in view of using material of suitable insulation'qualities and low dielectric losses, to make use of ceramic material.

The front side 2 of the moulding is provided with six cavities 3 accommodating the contact pieces 4. These contact pieces have a square bottom piece 4' which is located in the cavity 3.

ticularly from Figures 2 and 3.

As a result of the square form displacement of the contact pieces is completely avoided. Each contact piece comprises a tag t-normal to the bottom piece, this tag exhibiting two incisions so that a double soldering tag is formed. Consequently, two soldered joints can be established by means of each tag. The contact pieces are each secured to the moulding by means of a flanged tube 6. Since ridges 1 are left between the excavations 3, the leakage path between two succeeding soldering tags is so large as to obtain an excellent insulation resistance.

Fig. 1 furthermore shows that the length of the sides of the U-shaped cross sections of the arm increases towards the foot and more particularly according to the line of the moments, so that the moulding has a constant strength. For the vertical mounting of the supporting arm, that is, a mounting in which the arm extends normally to the surface of attachment of the base, a flat surface is provided at the bottom side I of the supporting arm, as appears more par- Between the sides Ill and II the foot 9 shows a ridge l2 in which a slit i3 is provided parallel with the plane of the contact pieces I. This slit serves to take up a set screw whose head it is shown in dotted lines in Fig. 2. The foot rests by means of two edges l5 and it on a base (not shown). The set screw is screwed into a screw hole'of the base or passed through an aperture thereof and tightened by means of a nut.

To permit also a horizontal attachment of the supporting arm, the foot 9 is provided with another bore I! (represented by dotted lines in Fig. 3). In the front side 2 of the supporting arm is provided a hexagonal cavity l8 accommodating a mounting nut. The supporting surface, with which the foot is provided for this manner of attachment, extends parallel with the front side 2 of the arm and is formed by two edges l9.

For the attachment of a number of condensers and resistances two supporting arms according to the invention are placed on a base, whereupon the supply conductors of the parts in ques- 4 tionaresecuredtothesolduingtagslofthe arms.

A supporting arm according to the invention is also suitable for supportim conductors which tendtosagowingtotheirgreatlength.

What I claim is:

1. An insulating support for electrical eonductors comprising a unitary elongated body of insulating material having a U-ahaped crosssection, a plurality of cavities in the outer surface of the bottom reach of said U-shaped member-for accommodating contact members which may be inserted in said cavities, said elongated body having a mounting foot at one end thereof and integral therewith, said mounting foot being formed of the bottom and sides of the U- shaped cross-section, said sides being longer at said foot end of said elongated body than at the other portions thereof, said aids being thicker at the portion of said foot end more remote from the middle of said elongated body than at the other portions of said foot end and defining a narrowed passageway therebetween, and an aperture in said outer surface of said bottom reach of said U-shaped member, said aperture extending into said narrowed passageway.

2. An insulating support as claimed in claim 1 in combination with metallic contact members in said cavities, and means for fastening said metallic contact members in said cavities.

HENDRIX DORJEE.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 525,708 Herrick Sept. ll, 1894 1,517,017 Roth Nov. 25, 1924 FOREIGN PATENTS Number Country Date 286,588 Italy June 16, 1931 

